/Engine/Plugins/Runtime/RigVM/Source/RigVMDeveloper/Public/RigVMCompiler/RigVMAST.h
Adds a parent to this expression this in consequence also adds this as a child to the parent
void AddParent ( [FRigVMExprAST](API\Plugins\RigVMDeveloper\RigVMCompiler\FRigVMExprAST) * InParent )